JPS55103785A - Semiconductor laser beam stop device - Google Patents

Semiconductor laser beam stop device

Info

Publication number
JPS55103785A
JPS55103785A JP1167979A JP1167979A JPS55103785A JP S55103785 A JPS55103785 A JP S55103785A JP 1167979 A JP1167979 A JP 1167979A JP 1167979 A JP1167979 A JP 1167979A JP S55103785 A JPS55103785 A JP S55103785A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
temperature
holder
constant
laser
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1167979A
Inventor
Akifumi Nakada
Toshio Sato
Masaharu Ushihara
Tomio Yoshida
Original Assignee
Matsushita Electric Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To eliminate breakdown and life deterioration of the device and prevent variation in the distance between semiconductor laser and light collecting lens by detecting the temperature of the holder of a light collecting lens and maintaining the temperature of the holder constant by cooling or heating it.
CONSTITUTION: Temperature sensor 31 is buried in holder 26. By this sensor 31, the temperature variation of holder 26 is taken out as voltage in temperature detector 32. The difference between this voltage and reference voltage V0 is taken out by differential amplifier 33, and it is made into a control signal. Filter 34 operates phase compensation on this control signal. Then, it is inputted to drive circuit 35, and thereby electronic heater-cooler 27 is operated so as to control the temperature. In this way, the temperature of holder 26 is maintained constant. As a result, since holder 26 has a constant temperature, the temperature of semiconductor laser 16 can be maintained constant, and the distance between laser 16 and light collecting lens 19 can be maintained constant.
COPYRIGHT: (C)1980,JPO&Japio
JP1167979A 1979-02-02 1979-02-02 Semiconductor laser beam stop device Pending JPS55103785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1167979A JPS55103785A (en) 1979-02-02 1979-02-02 Semiconductor laser beam stop device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1167979A JPS55103785A (en) 1979-02-02 1979-02-02 Semiconductor laser beam stop device

Publications (1)

Publication Number Publication Date
JPS55103785A true true JPS55103785A (en) 1980-08-08

Family

ID=11784673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1167979A Pending JPS55103785A (en) 1979-02-02 1979-02-02 Semiconductor laser beam stop device

Country Status (1)

Country Link
JP (1) JPS55103785A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911364U (en) * 1982-07-09 1984-01-24
JPS63217691A (en) * 1987-03-05 1988-09-09 Nippon Sheet Glass Co Ltd Light source for laser diode
JPS63224383A (en) * 1987-03-13 1988-09-19 Omron Tateisi Electronics Co Semiconductor laser light source
US5181214A (en) * 1991-11-18 1993-01-19 Harmonic Lightwaves, Inc. Temperature stable solid-state laser package
GB2395571A (en) * 2002-09-25 2004-05-26 Fujitsu Ltd Cabinet containing optical element and heater for stabilising temperature

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911364U (en) * 1982-07-09 1984-01-24
JPS63217691A (en) * 1987-03-05 1988-09-09 Nippon Sheet Glass Co Ltd Light source for laser diode
JPS63224383A (en) * 1987-03-13 1988-09-19 Omron Tateisi Electronics Co Semiconductor laser light source
US5181214A (en) * 1991-11-18 1993-01-19 Harmonic Lightwaves, Inc. Temperature stable solid-state laser package
GB2395571A (en) * 2002-09-25 2004-05-26 Fujitsu Ltd Cabinet containing optical element and heater for stabilising temperature
US6894851B2 (en) 2002-09-25 2005-05-17 Fujitsu Limited Optical device
GB2395571B (en) * 2002-09-25 2006-02-01 Fujitsu Ltd Optical device

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